Title (en)

RANDOM ACCESS METHOD AND APPARATUS IN MOBILE COMMUNICATION SYSTEM

Title (de)

DIREKTZUGRIFFSVERFAHREN UND -VORRICHTUNG IN MOBILKOMMUNIKATIONSSYSTEM

Title (fr)

PROCÉDÉ ET APPAREIL D'ACCÈS ALÉATOIRE DE SYSTÈME DE COMMUNICATION MOBILE

Publication

EP 3101989 A4 20171011 (EN)

Application

EP 15743751 A 20150129

Priority

• KR 20140011267 A 20140129
• KR 2015000988 W 20150129

Abstract (en)

[origin: EP3101989A1] The present invention relates to a random access method and apparatus for user equipment in a small cell base station having a small cell service area when cell carrier aggregation (for example, dual connectivity or inter-eNBcarrier aggregation) is performed between different base stations in a mobile communication system. A random access method in a mobile communication system according to an embodiment of the present invention comprises the steps of: receiving a configuration request message for configuring a serving cell group(SCG) from a second base station located within the service area of a first base station via the first base station; configuring the SCG cells according to the configuration request message and transmitting a configuration response message corresponding to the configuration request message to the second base station via the first base station; and performing a random access if uplink data exists in a logical channel(LCH) that is rearranged with the SCG cells.

IPC 8 full level

H04W 74/08 (2009.01); H04W 16/32 (2009.01)

CPC (source: EP KR US)

H04L 5/00 (2013.01 - EP US); H04W 16/32 (2013.01 - KR); H04W 28/0278 (2013.01 - KR); H04W 36/0005 (2013.01 - EP US); H04W 36/0077 (2013.01 - KR); H04W 56/001 (2013.01 - EP KR US); H04W 74/006 (2013.01 - KR US); H04W 74/0833 (2013.01 - EP KR US); H04W 36/0077 (2013.01 - EP US); H04W 36/08 (2013.01 - US); H04W 84/045 (2013.01 - US)

Citation (search report)

• [E] WO 2015087544 A1 20150618 - SHARP KK [JP]
• [XYI] ETRI: "Random Access Procedure for Small Cell Enhancements", vol. RAN WG2, no. Ljubljana, Slovenia; 20131007 - 20131011, 27 September 2013 (2013-09-27), XP050719009, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_83bis/Docs/> [retrieved on 20130927]
• [XI] CATT: "Overall Signaling flow over S1/Xn for 3C", no. San Francisco, CA, USA; 20131111 - 20131115, 13 November 2013 (2013-11-13), XP050738332, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN/RAN3/Docs/> [retrieved on 20131113]
• [Y] INTERDIGITAL COMMUNICATIONS: "Scheduling Aspects of MAC with Dual Connectivity", vol. RAN WG2, no. San Francisco, USA; 20131111 - 20131115, 13 November 2013 (2013-11-13), XP050737110, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN/RAN2/Docs/> [retrieved on 20131113]
• [A] ERICSSON: "Random Access for dual connectivity", vol. RAN WG2, no. Ljubljana, Slovenia; 20131007 - 20131011, 28 September 2013 (2013-09-28), XP050719184, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_83bis/Docs/> [retrieved on 20130928]
• See also references of WO 2015115844A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3101989 A1 20161207; EP 3101989 A4 20171011; CN 105940753 A 20160914; CN 105940753 B 20200324; CN 111491305 A 20200804; CN 111491305 B 20230428; KR 102307452 B1 20211005; KR 20150090859 A 20150806; US 10356821 B2 20190716; US 10448427 B2 20191015; US 10448428 B2 20191015; US 10893546 B2 20210112; US 11743947 B2 20230829; US 2015223270 A1 20150806; US 2016037562 A1 20160204; US 2016105911 A1 20160414; US 2020022190 A1 20200116; US 2021092777 A1 20210325; WO 2015115844 A1 20150806

DOCDB simple family (application)

EP 15743751 A 20150129; CN 201580006580 A 20150129; CN 202010127109 A 20150129; KR 2015000988 W 20150129; KR 20150014361 A 20150129; US 201514609266 A 20150129; US 201514879007 A 20151008; US 201514879020 A 20151008; US 201916579184 A 20190923; US 202017112788 A 20201204